class_docstr: Holds utility methods to work with a tokenized text and entity spans.
  
  Spans must be tuples containing the label (str), start char idx (int), and end char idx (int).
  
  Args:
      text: The text the spans refer to.
      tokens: The tokens of the text.
docstr: The tokens of the text.
docstr_tok: ["The","tokens","of","the","text","."]
code: def tokens(self) -> List[str]:
      """The tokens of the text."""
      return self._tokens
  
file_path: argilla/src/argilla/utils/span_utils.py
imports: from typing import Dict, List, Optional, Tuple
label_desc: Use image node_id 3 for calling the SpanUtils obj's underlying member method code with example usage: obj.tokens() and returns: self